#include <iostream>
#include <cstring>

using namespace std;

int main(void)
{
//	cout << int('A')65 << int('Z')90;

	string str;
	int l;
	cout << "string: ";
	cin >> str;
	l = str.length();

	int i;

	for(i = 0; i < l; i ++)
	{
		if((str[i] >= 65) && (str[i] <= 90))
			str[i] += 32;
	}

	cout << "string: ";
	cout << str << endl;

	return 0;
}
